Distributor plate and jet for stokers



March 1936 W. T. CAFPS I DISTRIBUTOR PLATE AND JET FOR STOKERS Filed Aug. 9, 1929 2 Sheets-Sheet 1 7 if/A March 3, 1936,

w. T. CAPPS DISTRIBUTOR PLATE AND JET FOR STOKERS Filed Aug. 9, 1929 2 SheetSSheet 2 WQE Patented Mar. 3, 1936 UNITED STATES PATENT OFFICE DISTRIBUTOR PLATE JET FoR sToKERs 11 Claims. (01. 110-101 One of the objects of my invention is to provide a distributor plate with a novel construction and arrangement of jet nozzle.

Another object of my invention is to provide a distributor plate with novel supporting means and air passages on its under face.

Another object of my invention is to provide a distributor plate with upstanding side walls to prevent contact of moving fuel from abrading the side walls of the firing opening in the back head of a fire box.

Another object of my invention is to provide a distributor plate with detachable upstanding fuel diverting ribs or surfaces at the forward corners of the plate, and having side walls substantially parallel to the trajectory of the fuel passing them and having a forward wall extending to and parallel with the forward edge of the distributing plate.

Another object of my invention is to provide in a locomotive fitted with a stoker, a fuel distributor plate located in the firing opening, said plate being rigidly fastened to the stoker at a point outside of the fire box and provided with an integral jet nozzle also located outside of the fire box wall; and with these and other objects in view my invention consists of the parts and combination of parts as will be hereinafter fully pointed out.

l In the drawings:

Figure 1 is a vertical longitudinal section through my distributor plate shown in position with associated parts of a stoker and back wall of a fire box taken on line ll of Fig. 2.

Figure 2 is a top plan view of my distributor plate.

Figure 31s a transverse longitudinal section of my improved nozzle taken on line 33 of Fig. 1.

1 Figure 4is a front elevationof 'my distributor plate in operative position.

Figure 5'is a front elevation of a detachable corner portion in position and provided with a fuel diverting channel.

Figure 6 is a top plan view of this corner piece.

The reference numeral 5 designates the back wall of a fire box having a fire door or firing opening 6 of any approved type. The discharge end 1 of a stoker is shown in Figure 1 fastened snugly around the firing opening 6 in the usual way.

My improved fuel distributor plate 8 with its jet nozzle 9, upstanding sidewalls l0, fuel diverting ribs or lugs II, and ribs I2 forming air channels 23 on its under face are all rigidly secured together thereby assuring a fixed relative position of one part with another; said plate also having at its rear end a depending integral flange l3 for the passage of securing screws or other like securing means' by which the plate is rigidly secured to the discharge end I of the stoker against any possibility of tilting or displacement, as clearly seen in Figure 1 at a point outside of the fire box.

.The distributor plate is substantially fiat and the upstanding side walls H] are given a more or less curvature to conform with the shape of the firing opening and are of such a length, shape and inclination forward as to fully protect the fire door opening. This prevents contact of the'fuel moving over the plate from dangerously abrading the side walls of the firing opening, especially on boilers with water back heads, thereby eliminating expensive repair to said walls. The upper edge of these side walls are provided with chipping strips l4 to enable the distributor to be accurately fitted to the firing opening. These side walls II] are of particular value in preventing the impingement, of coal deflected by the curved ribsll against the forward portion of the fire door opening. The upstanding walls Ill. also allow the use of widely diverging side jets, which .serve to sweep the plate clean, and toprevent the coal from coking fast thereto. a

The forward portion of the distributor plate burns away due to the heat of the fire box while the rear end stays in good condition for a considerably longer time. To prevent the necessity of discarding the entire plate when the forward end burns away I have constructed my plate in two parts (28) and-(21). The forward end, or renewable part (21) is rigidly secured to the rearward portion (28) by the bolts (24), through the lugs (25) on the upstanding side walls IO.

..It has been found that the forward corner portions of a stoker distributing plate burn away first and where such corner portions are integral with the plate the entireforward. half of the plate must be renewed although such portion of the plate as well as the rearlportion of the plate may be in good condition. To prevent thenecessity of renewing the entire plate when this is the case I have provided the renewable corners 29 and 30. The corners 29 and 30 are provided with the dowels 3| and 32, which fit in the plate. These corners are rigidly secured. to the plate by the bolt 33., Cast integralwith'the corners 29 and 30 are the ribs or channels I I. By this construction the ribs can also be renewed Without renewing any part of the plate when they wear away,

The distributor plate extends through the firing opening 1 so thatits forward end lies well within the firebox and its rear end carrying the nozzle 9 and flange l3 lies well outside the firing door. The jet nozzle 9 is so disposed at the rear end of the distributor plate as to form a riflle over which the fuel flows from the elevator of the stoker onto the distributor plate and said nozzle is provided with steam chambers l5l6, separated by a wall H, the front wall ,of these chambers having jet openings I 8, whihbpening's in one chamber are formed divergent to the openings of theother chamber, as shown in Figure 3. The fact that the nozzle is cast integral and its position fixed assures a fixed and permanent trajectory of the particles of steam issuing from the jet holes I8. The top of the nozzle slopes forwardly and rearwardly (see Ill-20) from a center line thereby facilitating and 'jsecuring a uniform flow of fueloverthetop of thenozzle and down in front and ahead of the jet openings. The flange i3 is in substantially the same vertical plane as the nozzle .9, as shown in Figure 1. As a result of the described construction and arrangement of the nozzle the fuel, as it falls over the 'riifie-nozzle, meets the issuing jets of steam and is caught by the blasts before settling in a mass on the distributor .plate and is thereby swept easily across the plate and prevented from becoming compacted thereon.

The fuel diverting lugs or ribs ll, as shown in Figure 2, are horn-shaped and located substantially at the forward corners of the plate 21, the outer .concavedside 251 being of shorter dimension than the inner convex side 2|, the forward end 22 of the side Zl at the thicker terminal of the rib extending to .the forward edge of the plate. These diverting ribs ll providing a surface against which the fuel is impinged are located substantially to the rear of the theoretically true position for distributing fuel in order to provide a long heavy section of metal to withstand thedeteriorating eifectof thefire box tem-.

perature.

The underface of the plate 8 is provided with integrally cast ribs I! which rest "on and hold the .plate spaced from the bottom wallof the firing opening and thereby obviate anypo'ssia bility of the plate 8 wearing away the bottom wall of the fire door opening and causing a leak of the water in the back .wall.

The chambers l5 and I6 and jet openings I8 are drilled in the metal so as to avoid the possibility of the bores being stopped up with sand, and. avoid the blow holes incident to cored passages.

In Figures 5 and .6 I show the corner piece, or portion (29, 30) provided with a fuel diverting gutter or channel vl I, which may be used instead of the ribs H.

' What I claim is:

1. A distributor plate having cut away portions forming recesses at its forward corners, detachable corner portions fitted in said recesses and having a dowel pin connection with the body of the plate, said' corner pieces being provided with fuel diverting ribs, and means detachably securing said corner pieces in position.

2. In a locomotive fitted with a stoker, the combination with a backhead having a fire door opening, of a fuel distributing plate having an exposed top surface provided with upstanding side walls extending from the outside" sheet to the inside sheet of the backhead to prevent contact of fuel moving under influence of steam or air jets from abrading the side walls of the fire door opening, said upstanding side walls terminating short of the forward end of said distributor plate, said plate being formed of two detachable parts, and lugs on said upstanding walls for rigidly attaching said parts.

3. In a locomotive stoker, a fire box having a fuel feed opening in one of its walls, a fuel feed device located exteriorly of the fire box, a distributor plate extending through the fuel feed. opening and having an inner portion projecting into the fire box and an outer portion extending outside the fire box, said portions being independently formed and detachably connected, side plates upon said portions lining the side walls of the fuel feed opening to protect the same from abrasion, fuel diverting means upon the inner portion of the plate, supporting means depending from the. plate and resting upon the bottom wall of the fuel feed opening to support the plate therein, fastening means upon the outer portion of the plate, detachably but rigidly securing said plate to the fuel. feed device, and an upstanding hollow rib upon the outer portion of and across said plate lying outwardly beyond the fuel feed opening and forming a rifile over which the fuel fiows from the fuel feed device onto'the plate, said rib being provided with jet apertures. 4. A distributor plate having cut away portions forming recesses at its front corners, detachaible corner plates fitted in said recesses and providedwith fuel diverting ribs, and means common to said corner pieces for rigidly fastening the same in position. 5. In a locomotive stoker, and in combination with a locomotive having a fire door opening, and a fuel feeder, a substantially U-shaped fuel distributor comprising a horizontal plate having .at each side an upstanding side wall, said side walls of the plate lying in parallel, relation with the side Walls of the fire door opening between the outer and inner margins thereof to prevent con! tact of fuel moving under influence of steam or air jets from abrading the said side walls of the fire door opening, said horizontal plate extending from outside the fire door opening to and through the same and. into the locomotive firebox, fuel defiectors at the corners of theinner portion of the plate to direct thefuel both forwardly and laterally into the firebox, and a hollow upstanding rib disposed transversely upon the outer portion of the plate and coextensive in length with the width of such portion of the plate, said rib having a substantially l -shaped top forming a continuous riflle over which the coal from the stoker may ride on its feed to theplate and having in its forwardside facing said plate a plurality of diverging jet openings arranged. to undermine the coal and sweep it across said plate. 6. In a furnace having an upright wall with a firing opening therein, a distributor plate extending through said opening into thefurnace and having a .top' surface across which fuel is projectedinto the furnace, said. plate beingprovided on its top surface at the forward corners thereof with divergent upstanding curved ribs, said distributor plate having side walls curving upwardly from the side edges thereof, said side walls being coextensive in width with the side wallsof the firing opening and terminating at their forward ends a distance rearward of :the forward ends of said ribs to form laterally opening channels between said side walls and ribs.

'7. In a furnace having an upright wall with a firing opening therein, a distributor plate extending through said opening into the furnace and having a top surface across which fuel is projected into the furnace, said plate being provided on its top surface at the forward corners thereof with divergent upstanding curved ribs, said distributor plate having side walls curving upwardly from the side edges thereof, said side walls being coextensive in width with the side walls of the firing opening, said side walls also being spaced apart a greater distance than said curved ribs and terminating at their forward ends a distance rearward of the forward ends of said ribs to form laterally and forwardly opening channels between said side walls and ribs.

8. In a furnace having an upright wall with a firing opening therein, a distributor plate extending through said opening into the furnace having a top surface across which fuel is projected into the furnace, said plate being provided on its top surface at the forward corners thereof with divergent upstanding curved ribs, said distributor plate having side walls extending upwardly from the side edges thereof, said side walls terminating at their forward ends a distance rearward of the forward ends of said ribs to form laterally opening channels between said side walls and ribs.

9. In a locomotive stoker, a firebox having a fuel feed opening in one of its walls, a distributor plate extending through the fuel feed opening and having an inner portion projecting into the firebox and an outer portion extending outside the firebox, said portions being independently formed, the part of each of said portions within the firing opening being provided with side plates lining the side walls of the fuel feed opening to protect the same from abrasion, lugs on said side plates within the firing opening above the level of the fuel receiving surface of said plate and bolts extending longitudinally of said portions, each connecting a respective pair of lugs for securely fastening said portions together.

10. A distributor plate having a recess in each of its front corners, separable corner portions fitted in said recesses, said corner portions being provided with fuel-diverting ribs, and means detachably securing said corner portions in position.

11. In a locomotive stoker, a fire box having a fuel feed opening in one of its walls, a fuel feed device located exteriorly of the fire box, a distributor plate extending through the fuel feed opening and having an inner portion projecting into the fire box and an outer portion extending outside the fire box, said portions being independently formed and detachably connected, side plates upon said portions lining the side walls of the fuel feed opening to protect the same from from abrasion, fuel diverting means upon the inner portion of the plate, supporting means depending from the plate and resting upon the bottom wall of the fuel feed opening to support the plate therein and fastening means upon the outer portion of the plate detachably but rigidly securing said plate to the fuel feed device.

WASHINGTON T. CAPPS. 

